How to install Andriod Pie based Nitrogen ROM on Oneplus 3/3T

Android Pie

Google has uploaded Android Pie’s source code to AOSP last week after the roll-out of official updates for the Google Pixel/XL and the Google Pixel 2/XL. So the development community could now start its work on porting Android Pie. Though oneplus confirmed that Oneplus 3 and 3T will get Android Pie update, but there is no official date. Thanks to the XDA Dev team who have provided Android Pie based nitrogen OS. Let us see how to install Android Pie on oneplus 3/3T

Enable USB Debugging and OEM Unlocking

click the About phone Options, In Android O its hidden under system options

click on build number options 5-7 times to enable developer mode, You will get a message its enabled.

Now in main settings screen we can see Developer options.

Go to settings–> developer option in your device and enable OEM unlocking and USB debugging. Below are the sample images where you can find both options. Below are the screenshots for reference.

OEM Unlock sample. Click to enlarge

Unlock bootloader and installing TWRP

Move the downloaded TWRP recovery image in the same folder where you’ve installed ADB and fastboot as mentioned in the prerequisites

Rename the recover image file to twrp.img for easier access

Now press SHIFT key and right-click on an empty space inside the folder and Select ‘Open PowerShell window here’ from the right click menu that appears. If your PC running on windows 10 the option will “Open command window here”

A command prompt window shall open on your PC now.

Now we have to boot your device into Fastboost. To do so

Switch off your device

Press and hold the Power up and volume down button together for 5-10 seconds

Your phone will start boot into recovery mode .

Select “English” as your language , choose “Advanced” in the next screen and select “Reboot to Fastboot” in your next screen.

Now Connect your device to your PC with the standard USB cable and Change the USB connection mode to “file transfer (MTP)” mode

Now execute the following command in the command prompt. This will display the devices that are connected to the PC

Command

fastboot devices

Then execute the below command in the command prompt to unlock your bootloader.

Command

fastboot oem unlock

Now you may get a pop up in your phone about unlocking the boot loader. Choose Yes by pressing Volume Up and press the Power Button.

Your bootloader is unlocked now. Now let us install TWRP on your device

Run the below command now in the command prompt to install twrp

Command

fastboot flash recovery twrp.img

This will start install TWRP recovery in your device.

How to install Android Pie

Once the process is completed, Press and hold the Power up and volume down button together and type the below command to reboot your device to reboot into recovery mode

Command

fastboot reboot

Your phone will start boot into recovery mode .

Select “English” as your language , choose “Advanced” in the next screen and select “Reboot to recovery” in your next screen.

You will see TWRP screen as below

Change the partition to ext4

in TWRP Home page Select “Wipe” > “Advanced Wiper”

Select “Data” and then click “Repair or Change File System”

Select “Change File System”

Choose “ext4”

Swipe to the right to confirm flash.

Now repeat the same steps, but in step 2, Select “Cache” instead of data.